(Strip Number 938, Original Publication Date, 12 September 1985)
Panel 1: We find Elly and Carol looking out the picture window. As they do so, Carol talks about how nice it is to see Mike and Brian getting along so well together.
Panel 2: Elly tells her that Mike and Lizzie were looking forward to having new kids to play with.
Panel 3: Seconds later, Brian comes in and talks about how Mike is bothering him.
Panel 4: As Elly storms out to bellow at Mike, she tells Carol that the novelty's worn off.
Summary: Given that Mike has to be told that Brian is Japanese, Elly's probable attempt to violently enforce cultural sensitivity isn't the problem. Given that Mike is a vain idiot who thinks that he always gets to be in charge, Brian's wanting a turn setting the agenda is. Then again, he COULD think that Brian and his family are FROM Japan because he's being raised to be a blithering idiot so that horses may be owned.